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(#) Using deprecated resources

!!! WARNING: Using deprecated resources
   This is a warning.

Id
:   `Deprecated`
Summary
:   Using deprecated resources
Severity
:   Warning
Category
:   Correctness
Platform
:   Android
Vendor
:   Android Open Source Project
Feedback
:   https://issuetracker.google.com/issues/new?component=192708
Since
:   Initial
Affects
:   Kotlin and Java files, manifest files and resource files
Editing
:   This check runs on the fly in the IDE editor
Implementation
:   [Source Code](https://cs.android.com/android-studio/platform/tools/base/+/mirror-goog-studio-main:lint/libs/lint-checks/src/main/java/com/android/tools/lint/checks/DeprecationDetector.kt)
Tests
:   [Source Code](https://cs.android.com/android-studio/platform/tools/base/+/mirror-goog-studio-main:lint/libs/lint-tests/src/test/java/com/android/tools/lint/checks/DeprecationDetectorTest.kt)
Copyright Year
:   2011

Deprecated views, attributes and so on are deprecated because there is a
better way to do something. Do it that new way. You've been warned.

!!! Tip
   This lint check has an associated quickfix available in the IDE.

(##) Example

Here is an example of lint warnings produced by this check:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~text
res/layout/deprecation.xml:1:Warning: AbsoluteLayout is deprecated
[Deprecated]
&lt;AbsoluteLayout xmlns:android="http://schemas.android.com/apk/res/android"
 --------------
res/layout/deprecation.xml:15:Warning: android:autoText is deprecated:
Use inputType instead [Deprecated]
    android:autoText="true"
    -----------------------
res/layout/deprecation.xml:16:Warning: android:capitalize is deprecated:
Use inputType instead [Deprecated]
    android:capitalize="true"
    -------------------------
res/layout/deprecation.xml:17:Warning: android:editable is deprecated:
Use an <EditText> to make it editable [Deprecated]
    android:editable="true"
    -----------------------
res/layout/deprecation.xml:19:Warning: android:inputMethod is
deprecated: Use inputType instead [Deprecated]
    android:inputMethod="@+id/foo"
    ------------------------------
res/layout/deprecation.xml:20:Warning: android:numeric is deprecated:
Use inputType instead [Deprecated]
    android:numeric="true"
    ----------------------
res/layout/deprecation.xml:21:Warning: android:password is deprecated:
Use inputType instead [Deprecated]
    android:password="true"
    -----------------------
res/layout/deprecation.xml:22:Warning: android:phoneNumber is
deprecated: Use inputType instead [Deprecated]
    android:phoneNumber="true"
    --------------------------
res/layout/deprecation.xml:25:Warning: android:editable is deprecated:
<EditText> is already editable [Deprecated]
    &lt;EditText android:editable="true" /&gt;
              -----------------------
res/layout/deprecation.xml:26:Warning: android:editable is deprecated:
Use inputType instead [Deprecated]
    &lt;EditText android:editable="false" /&gt;
              ------------------------
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Here is the source file referenced above:

`res/layout/deprecation.xml`:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~xml linenumbers
&lt;AbsoluteLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" &gt;

    &lt;Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_x="5dp"
        android:layout_y="100dp"
        android:text="Button" /&gt;

    &lt;!--  Deprecated attributes --&gt;
    &lt;TextView
        android:autoText="true"
        android:capitalize="true"
        android:editable="true"
        android:enabled="true"
        android:inputMethod="@+id/foo"
        android:numeric="true"
        android:password="true"
        android:phoneNumber="true"
        android:singleLine="true" /&gt;

    &lt;EditText android:editable="true" /&gt;
    &lt;EditText android:editable="false" /&gt;

&lt;/AbsoluteLayout&gt;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

You can also visit the
[source code](https://cs.android.com/android-studio/platform/tools/base/+/mirror-goog-studio-main:lint/libs/lint-tests/src/test/java/com/android/tools/lint/checks/DeprecationDetectorTest.kt)
for the unit tests for this check to see additional scenarios.

The above example was automatically extracted from the first unit test
found for this lint check, `DeprecationDetector.testApi4`.
To report a problem with this extracted sample, visit
https://issuetracker.google.com/issues/new?component=192708.

(##) Suppressing

You can suppress false positives using one of the following mechanisms:

* Adding the suppression attribute `tools:ignore="Deprecated"` on the
  problematic XML element (or one of its enclosing elements). You may
  also need to add the following namespace declaration on the root
  element in the XML file if it's not already there:
  `xmlns:tools="http://schemas.android.com/tools"`.

  ```xml
  &lt;?xml version="1.0" encoding="UTF-8"?&gt;
  &lt;manifest xmlns:tools="http://schemas.android.com/tools"&gt;
      ...
      &lt;AbsoluteLayout sharedUserId="..." tools:ignore="Deprecated" .../&gt;
    ...
  &lt;/manifest&gt;
  ```

* Using a suppression annotation like this on the enclosing
  element:

  ```kt
  // Kotlin
  @Suppress("Deprecated")
  fun method() {
     getInstance(...)
  }
  ```

  or

  ```java
  // Java
  @SuppressWarnings("Deprecated")
  void method() {
     getInstance(...);
  }
  ```

* Using a suppression comment like this on the line above:

  ```kt
  //noinspection Deprecated
  problematicStatement()
  ```

* Using a special `lint.xml` file in the source tree which turns off
  the check in that folder and any sub folder. A simple file might look
  like this:
  ```xml
  &lt;?xml version="1.0" encoding="UTF-8"?&gt;
  &lt;lint&gt;
      &lt;issue id="Deprecated" severity="ignore" /&gt;
  &lt;/lint&gt;
  ```
  Instead of `ignore` you can also change the severity here, for
  example from `error` to `warning`. You can find additional
  documentation on how to filter issues by path, regular expression and
  so on
  [here](https://googlesamples.github.io/android-custom-lint-rules/usage/lintxml.md.html).

* In Gradle projects, using the DSL syntax to configure lint. For
  example, you can use something like
  ```gradle
  lintOptions {
      disable 'Deprecated'
  }
  ```
  In Android projects this should be nested inside an `android { }`
  block.

* For manual invocations of `lint`, using the `--ignore` flag:
  ```
  $ lint --ignore Deprecated ...`
  ```

* Last, but not least, using baselines, as discussed
  [here](https://googlesamples.github.io/android-custom-lint-rules/usage/baselines.md.html).

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